Car-truck.



-MrBNTEDocTl 6, 1903i E.l W. SUMMERS.

CAR TRUCK.

APPLIOATION FILED A-UG. a. 1903.

No IoDE'L.

z SHEETS-SHEET l1.

INVENTDR TN srie.v XM

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Y No. 740,605. -PATENTBD OCT. e, 19.03.

E. W; SUMMERS.

Y GAR TRUCK.

APPLICATION FILED AUG. 8. 1903.

"um" u z SHEETS-SEEN 2 iro. 740,605.

UNITE STATES atentea october c, 190s;

'PATENT OFFICE.

GAR-,raue K..

srncIFIcA'rIoN forming part of Letters Patent No, 740,605, date october e, 190e. Application filed August 8, 1903. ASerial lo. 168,747. (No modeld To all whom it may concern:

, Be it known that I, EDGAR W. Sui/Innes, of Pittsburg, in thel county of Allegheny and State of Pennsylvani a, have invented a certain nenr and useful Improvement in Car-Trucks,

of which improvement the following is a speci-- iication, reference being had to the accompanying drawings,forming part of this specilication, in which- Figure 1 is aside elevation'of the side frame, partly in `vertical section, showing' a portion 'of my improved truck. Fig. 2 is a partial top plan View showing a portion of a side frame 'and of the transom.

Figs. 4. and 5 are the top plan and side elevation views of the spring-cap, which spring-cap Y also serves as the pivoting-seat for the segmental roller side bearing. tical transverse sectional view taken in the line 6 6 in Fig. -1.

My invention relates to the class oftrucks 4for railway-cars', and is designed to provide a truck of simple construction which may carry the whole load of the car on the sidebearing directly over the center ofthe side frame. This truck is designed along the lines brought out in my Patents N o. 723, 755, patenttransom projects upward, cooperating with a l hole in the framing ofthe car-body.

In the drawings I show a truck side frame as having an upper compression member 2, a depending tension member 3, alower connect ing member 4. The compression member 2 is a composite member made of two parts, which are preferably pressed, having their central portion spaced, apart and their end portions brought nearer together, with end portions of the tension member 3 acting as a separator, and the U-shaped bearing-plate 5 inclosing the end portions of 2 and 3, and the whole held in place by the rivets 6, which makes a rigid construction with but few rivets. The bearing-plate 5 rests on the top of the ordinary journal-box. Podes tais 7 have their top Fir. 3 is a transverse vertical section taken in line 3 3 in Fig. 2.

Fig. l6 is a verends attached to bearing-plate 5 and their lower ends attached to bottom member 4, the innerv pedestal 7 being preferably fastened with rivets and the outer pedestal 7 having bolt connections. The segmental lroller S, which is similar to that shown in my patents above referred to, rests in the spring-cap 9 in the pivot-seat 10, which is preferably below the tops ofthe springs, the object being to obtain a side bearing of low frictional resistance by-having a segmental roller of large diameter, and this can be best accomplished by extending the pivot-point of the roller below the springtop- The spring-cap 9 is preferably made of a steel casting and is provided with springseats 11 and inner projecting lugs 12, with side ribs 13 and center ribs 14C. I also provide a spring'seat 15 of the common pattern, which spring-seat rests on the horizontal member 4.

. ,The tension member 3 projects downward througha slot 16, which is in thecentral part `of horizontal member 4. The saddle 17, which is made preferably aV steel casting,

rests. in the angle of the tension member 3. The lower transom member 1S is interposed between the saddle 17 and the horizontal ,member 4, the whole assemblage carrying the spring load directly to tension member 3. At Y the center of the side frame I provide side plates 19, having inwardly-bent upper anges 20, which are fastened to top compression member 2 and the top transom member 21 by common rivets 22. The lower end'of 19 is fastened to the upturned iiange 23 of ythe horizontal member Ll. These side members 19 serve as spacers between the 'upper and lower horizontal members of the side frame, the inner side plate 19 serving also as a support for brakefbeam hanger 24.

In this truck as the whole vertical load is to be carried on the side bearings in the side frame and no vertical load is carried on the central portion of the transom other than that which may be caused by friction I therefore provide a light construction with a central pivot-pin 25, which is supported on transom member 21 and is adapted to cooperate with a pivot-hole 26 in the bottom part of the car- Y truck-frame and the car-bodyand is also arranged to permit of a vertical movement of the truck relative to the car-body. In the transom I also provide diagonal members 27 and vertical member 2S, which are clearly shown on Fig. 3. It will be noted that lines drawn through the centers of gravity of the tension member and compression member of the side frame intersect in a vertical plane drawn through the axis of the journal and also that the inner portion of the tension member is of constant section. These important features are covered in the patents above referred to and are only claimed specifically herein. In the modern cars of large capacity it has been found necessary, on account of the standard height of couplers between cars and on account of the'greater strength required to carry the increased loads, to build the sides of the cars down lower and the tops of the truck-frames up higher than in the earlier cars of lighter burden capacity. Therefore in order to obtain a roller side bearing of low frictional resistance by the use of a segmental roller it is necessary to pierce through the truck side frame and support the roller near the base of the frame.

Many changes may be made in the form and arrangement of the truck and its parts, as well as the side bearing and the center pivoting-pin, without departing from my invention.

I claim- 1. A car-truck side frame having an upper compression member, a lower tension member, a segmental roller side bearing which is supported on springs at the center of the side frame, and is adapted to carry the whole live load on the truck side frame; substantially as described.

2. A car-truck side frame having a composite, spaced-apart, upper compression member, a lower tension member, a segmental roller side bearing resting on a spring-cap near the base of the side frame, and having its upper end project up between the sides of the composite, spaced apart compression member; substantially as described.

3. A cartruck side frame having an upper compression member, a lower tension member, a segmental roller side bearing resting in a spring-cap, the point of support being below the spring-seat which is on the under side of the spring-cap; substantially as described.

4. A car-truck side frame having an upper compression member, a lower tension member, a plurality of load-carrying springs, a spring-cap, a segmental roller side bearing which pivots in the spring-cap; substantially as described.

5. A car-truck side frame having an upper compression member, a lower tension member, a plurality of load-carrying springs, a spring-cap, a segmental roller side bearing which pivots in the spring-cap, the pivot-seat being below the top of the springs; substantially as described.

6. A car-truck side frame having an upper compression member, a lower tension member, a plurality of load-carrying springs, a spring-cap, a roller side bearing which rests in the spring-cap, the seat for the roller being below the top of the springs.

7. A car-truck side frame having a plurality of load-carrying springs locatedv at or near the center of the side frame, a spring-cap resting on said springs, a segmental roller side bearing having its seat in the spring-cap and below the top ofthe springs; substantially as described. 8. A car-truck side frame having a plurality of load-carrying springs located at or near the center of the side frame, a spring-cap resting on said springs, a segmental roller side bearing resting on the spring-cap; substantially as described.

9. A car-truck side frame having an upper compression member, a lower tension member, a saddleresting on the lower tension member, a plurality of springs supported on the saddle, a spring cap resting on the springs, a segmental roller side bearing resting on the cap; substantially as described.

10. A car-truck side frame having a composite, spaced-apart upper compression member, a lower tension vmember having its ends between the ends of the composite uppercompression member, with the ends of the tension and compression members riveted together, a

saddle and load-carrying springs resting on the central portion of the lower tension member; substantially as described.

l1. A car-truck side frame having a compos ite, spaced-apart upper compression member, a lower tension member having its ends between the ends of the composite upper compression member, With the ends of the tension and compression members riveted together, a saddle and load-carrying springs resting on the central portion of the lower tensionmember, the longitudinal lines through the centers of gravity of said tension and compression members intersecting, substantially in a vertical plane lying in the longitudinal axis of the journal; substantially as described.

l2. A car-truck sideframe having a composite, spaced-apart, upper compression member, a lower tension member having its ends between the ends of the upper compression member, a U-shaped bearing-plate incasing the ends of the tension and compression members, said top compression member, bottom tension member and U-shaped bearing-plate being secured together by the same rivets; substantially as described.

13. A truck-frame having roller-bearings in its side frames and said side frames connected by tie-bars provided with a pivot-pin, combined with the car-body framing supplied with side bearings resting directly on said roller-bearings, and a socket-hole cooperating with the pivot-pin aforesaid.

14. A truck-frame having roller-bearings -in its side frames, and said frames connected IOO IIO

15. A ear-truck side rame having an upper compression member, a lower tension member, a pluralityT of springs near the centralv portion of the side frame, a lower horizontal member, tie-bars `connecting the lower hori- Zontal member and the upper compression member, and a brake-beam hanger attached to a tie-bar aforesaid, substantiallyr as described. 15 In testimony whereof I have hereunto set my hand.

EDGAR W. SUMMERS. v

Witnesses:

F. E. GAITHER, E. H. MoYER. 

